Nouns

(n)numeral, numbera symbol used to represent a number“he learned to write the numerals before he went to school”
(n)numerala word expressing a number.“Numerals may be attributive, as in ‘two dogs’, or pronominal, as in ‘I saw two (of them)’.”

Adjectives

(a)numeral, numerical, numericof or relating to or denoting numbers“a numeral adjective”, “numerical order”, “a numeric symbol”